Remove the smooth animation in Blender
You may try to set the interpolation type of the curves to Constant.


If you're looking for a manequin, bizzare looking movement try the Bounce effect. 


Here's this dynamic effect applied to the head and a right hand of the model.


I also encourage you to test some other available types of interpolations, for the different (sometimes really amazing) movement types. Maybe one of them'll fit your needs.